Fix healthcheck for addonindeox image

addonindex uses docker.io/paketobuildpacks/run:base-cnb that doesn't have curl, so healthcheck now just checks for running java process

files/addons/docker-compose.yml

@@ -12,7 +12,7 @@ services:
       - BINTRAY_USERNAME
       - BINTRAY_API_KEY
     healthcheck:
-      test: ["CMD", "curl", "-sSL", "http://localhost:8080/"]
+      test:  ["CMD-SHELL", "[ $$(ps -o comm= -p 1) = \"java\" ]"]
       timeout: 15s
     links:
       - elasticsearch